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Finding the Fourth Proportional to 139,001.12, 191,816.88 and 82,378.88

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Solution

The fourth proportional to 139,001.12, 191,816.88 and 82,378.88 is: 113,680.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    139,001.12 : 191,816.88 = 82,378.88 : x
  2. Step 2: Convert to fraction form
    139,001.12/191,816.88 = 82,378.88/x
  3. Step 3: Cross multiply
    139,001.12x = 191,816.88 × 82,378.88
  4. Step 4: Simplify right side
    139,001.12x = 15,801,659,739.49
  5. Step 5: Solve for x
    x = 15,801,659,739.49/139,001.12
  6. Step 6: Final answer
    x = 113,680.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.